Rank of coal

As I promised ,details about rank of Coal are given below :
 DIFFERENT TYPE OF COAL & THEIR PROPERTIES

1. ANTHRACITE :

• Non-coking coal
• V.M                    -3 to 10%
• Carbon               - 92%
• Moisture             - 2 to 4%
• H2                       - 2.8 to 3.9%
• Calorific value    - 8100 to 8700 K-Cal /Kg
• Ash                     - nil
• Age                     - 300 X 1000000 yrs.
• Matured Coal

2. BITUMINOUS COAL

• a.Non-coking coal or b. Coking coal
• V.M                    -17 to 44%
• Carbon               - 82 to 87%
• Moisture             - 0.5 to 8%
• H2                       - nil
• Calorific value    - 7300 to 8900 K-Cal /Kg
• Ash                     -12 to 44%
• Age                     - 120 to 245 X 1000000 yrs.

3. SUB - BITUMINOUS COAL 

• Non-coking coal
• V.M                    - 4 %
• Carbon               - 70 -78%
• Moisture             - 12 to 25%
• H2                       - NIL
• Calorific value    - 6800 to 7600 K-Cal /Kg
• Ash                     -More than 30%
• Age                     - 60 to 120 X 1000000 yrs.

 4. LIGNITE

• Non-coking coal
• V.M                    - 27- 45 %
• Carbon               - More than Sub- Bituminous coal
• Moisture             - 30 to 50%
• H2                       - NIL
• Calorific value    - 6500 to 7000 K-Cal /Kg
• Ash                     - 35 to 40%
• Age                     - 20 to 60 X 1000000 yrs.

 5. PEAT

• V.M                    -50 -55% %
• Carbon               - 55 -60%
• Moisture             - 15 to 25%
• H2                       - NIL
• Calorific value    - 4500 to 5000 K-Cal /Kg
• Ash                     -3 to 10%
• Age                     - More than 1 X 1000000 yrs

Difference between coking coal & non-coking coal : Lumps is formed in coking coal only after heating.
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